Do u all factory reset the phone before the Android m update?
Sent from Asus ASUS_Z00AD using GAGT
try to use it a few days and see if there is any abnormality. don't reset if it continues to work well.
in theory, it is always good to reset, but if it is a phone that you've been heavily used for > a year, it takes a lot of time and effort to painstakingly backup all your data and pics.
e.g LINE app - if you factory reset and reinstall LINE, all your past chats/pics will be wiped out. and backing up chatrooms and pics is not a mere single button task for LINE app.
for my case, i downloaded the FW OTA in my office this morning and manual installed it ... as it is. after which, i downloaded a cache cleaner app and ran it followed by a reboot. will monitor the performance for next 2-3 days. will keep factory reset as last resort if things didn't do well.